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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2024-12-22 12:16:41 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-12-22 12:16:41 -0800 |
| commit | b1fdbe77be6d31d78ecc2a82ea7167773293fed0 (patch) | |
| tree | 1f1f9bd07ff6315808d44e1821f8e025587cb652 /arch/x86/include/asm/cpufeatures.h | |
| parent | Merge tag 'devicetree-fixes-for-6.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux (diff) | |
| parent | Merge tag 'kvm-x86-fixes-6.13-rcN' of https://github.com/kvm-x86/linux into HEAD (diff) | |
| download | wireguard-linux-b1fdbe77be6d31d78ecc2a82ea7167773293fed0.tar.xz wireguard-linux-b1fdbe77be6d31d78ecc2a82ea7167773293fed0.zip | |
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM x86 fixes from Paolo Bonzini:
- Disable AVIC on SNP-enabled systems that don't allow writes to the
virtual APIC page, as such hosts will hit unexpected RMP #PFs in the
host when running VMs of any flavor.
- Fix a WARN in the hypercall completion path due to KVM trying to
determine if a guest with protected register state is in 64-bit mode
(KVM's ABI is to assume such guests only make hypercalls in 64-bit
mode).
- Allow the guest to write to supported bits in MSR_AMD64_DE_CFG to fix
a regression with Windows guests, and because KVM's read-only
behavior appears to be entirely made up.
- Treat TDP MMU faults as spurious if the faulting access is allowed
given the existing SPTE. This fixes a benign WARN (other than the
WARN itself) due to unexpectedly replacing a writable SPTE with a
read-only SPTE.
- Emit a warning when KVM is configured with ignore_msrs=1 and also to
hide the MSRs that the guest is looking for from the kernel logs.
ignore_msrs can trick guests into assuming that certain processor
features are present, and this in turn leads to bogus bug reports.
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: x86: let it be known that ignore_msrs is a bad idea
KVM: VMX: don't include '<linux/find.h>' directly
KVM: x86/mmu: Treat TDP MMU faults as spurious if access is already allowed
KVM: SVM: Allow guest writes to set MSR_AMD64_DE_CFG bits
KVM: x86: Play nice with protected guests in complete_hypercall_exit()
KVM: SVM: Disable AVIC on SNP-enabled system without HvInUseWrAllowed feature
Diffstat (limited to 'arch/x86/include/asm/cpufeatures.h')
| -rw-r--r-- | arch/x86/include/asm/cpufeatures.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index 17b6590748c0..645aa360628d 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -452,6 +452,7 @@ #define X86_FEATURE_SME_COHERENT (19*32+10) /* AMD hardware-enforced cache coherency */ #define X86_FEATURE_DEBUG_SWAP (19*32+14) /* "debug_swap" AMD SEV-ES full debug state swap support */ #define X86_FEATURE_SVSM (19*32+28) /* "svsm" SVSM present */ +#define X86_FEATURE_HV_INUSE_WR_ALLOWED (19*32+30) /* Allow Write to in-use hypervisor-owned pages */ /* AMD-defined Extended Feature 2 EAX, CPUID level 0x80000021 (EAX), word 20 */ #define X86_FEATURE_NO_NESTED_DATA_BP (20*32+ 0) /* No Nested Data Breakpoints */ |